US1080036A

US1080036A - Sheet-delivery mechanism.

Info

Publication number: US1080036A
Application number: US58962710A
Authority: US
Inventors: Joseph White
Original assignee: HALL PRINTING PRESS Co
Current assignee: HALL PRINTING PRESS Co
Priority date: 1910-10-28
Filing date: 1910-10-28
Publication date: 1913-12-02
Anticipated expiration: 1930-12-02

Description

J. WHITE. SHEET DELIVERY MECHANISM. APPLIoATIoN FILED 00T. 2a

Patented Dec. 2,1913.

2 SHEETS-SHEET 1.

J. WHITE. SHEET DELIVERY MEGHANISM. APPLIGATION FILED 00T. ze, 1910.

3l u m n 1 E m C. e s mm Dm f 11 Mm m 2 N\ nba l |l *l `N .Q DL NN @n IT nml t m Q V- om mm UNiTED STATES JOSEPH WHITE, OF PISCATAWAY TOWNSHIP, MIDDLESEX COUNTY, NEW JERSEY,

ASSIGNOR T0 HALL PRINTING PRESS COMPANY, OF DUNELLEN, NEW JERSEY,

CORPORATION 0F NEW JERSEY.

SHEET-DELIVERY MECHANISM.

Specification of Letters Patent.

Application filed October 28, 1910. Serial No. 589,627.

To all whom t may concern.:

Be it known that I, JOSEPH WHITE, a citizen of the United States, residing in Piscataway township, county of Middlesex, State of New Jersey, have invented certain new and useful Improvements in Sheet-Delivery Mechanism.

In the accompanying drawings, I have illustrated one form of my novel devices in a delivery mechanism which consists of an endless carrier for a pair of gripper bars which engage the forward end of the sheet, taking it from the gripper mechanism of the impression cylinder and carrying it forward over and allowing it to drop on the delivery pile. Where a` carrier of this description is employed, the sheets are apt to drop irregularly, especially when the machine is run at' a high speed, making an uneven pile, but I have found that y by `stretching the sheet over the delivery pile while it is in control of the carrier, and retarding its motion from behind and allowing the final movement of the sheet to be effected from the tail, the sheets will be delivered on the delivery pilewith great ac-` curacy and in smooth condition.

Referring to the drawings Figure 1 is an elevation of so much of the machine as is required to illustrate the invention in the form which I have chosen for lpurposes of illustration. Fig. 2 is a plan view of Fig. l.

1 and 2 represent the side frames of the machine in which is mounted the impression cylinder 3, in which is mounted the usual gripper shaft 4 having its set of .sheet-taking grippers 5. On the end of said shaft 1s fastened the usual tumbler 6 which is rocked by the usual tumbler pins to open and close the grippers.

As this invention relates to the delivery part of the machine, the opening tumbler pin 7 only 'is shown. In the forward rotation of the impression cylinder the tumbler 6 strikes the tumbler pin 7 and rocks the shaft 4, causing the grippers to open and release the sheet.

Fastened to the impression cylinder?) is.

a driving gear 8 which meshes with a gear 9 fastened to the sprocket shaft 10, said shaft, being mounted in the side frames of the machine. This sprocket shaft has a pair of driving sprockets 11 and 12 fastened to it, over which runs a pairrof endless chains 13 and 14. These chains also pass over another pair of

sprockets

25 and 26 mounted on studs 27 in the side frame of the machine, saidstudsbeing adjustable 1n slots 28, by which means the chains are given their proper tension. The length of the chain being equal .to twice the periphery of the 1mpress1on cylinder, two sets of grippers are mounted thereon in order to take a sheet from the impression cylinder every revolution.

The bar supporting links on the chain consist of plates 15 to which is rigidly fastened rod 16 and in which is journaled `gripper shaft 17. The rods 16 have formed cam 24, the grippers are opened, allowing the sheets to drop on a pile in a manner to be hereinafter described.'

I'Vhile the method of retarding the tail of the sheet and applying tension to the same for the purpose of stretching it while in control of the grippers may be varied widely, the preferred form in the type of machine illustrated consists of a pairof retarding rollers controlled and operated in the following manner: J ournaled in the side frames just behind the delivery board and below the delivery chains and the path of the delivery grippers, is a retarding roller 30. It will be seen'that in the forward movement of the sheets while they are being delivered, the sheets will be drawn over this roller. Fastened to pulley 33 loosely mounted on the end of roller 30 is an arm 34, which carries a pawl 35 which engages a ratchet 36, said ratchet being fastened to the retarding roller 30. Pulley 31 is attached to the shaft of the cylinder 3 and the belt 32 connects pulleys 31 and 33, these pulleys being so proportionedthat the surface of the roller 30 has a slower speed than the speed of the surface of cylinder 3 or of the grippers 19.

vFastened to one end of Athis rockshaft 39 is an arm 40 to which is' pivoted a connection 41, the other end of which is connected to arm 42 formed on a hub\ 43 loosely pivoted on a stud 44 fastened in the side frame of the machine. Thishub 43 has another arm 45 formed on it, one end of which carries a roller 46 which runs upon a cam 47, said cam being adjustably fastened to the end of the impression cylinder.

By 'means -of the connections and parts previously mentioned, it can be seen that the retarding wheels 37 will be moved into and out` of contact with the retarding roller 30, and that the sheets to be delivered passing between theretarding roller and the wheels will be nipped, and as they are moving at a slower speed than the sheet or the grippers 19, the sheet. will be stretched between the grippers holding' the forward end and the retarding rollers acting upon the rear end. This cam 47 is so formed as tocause the wheels to rise in time to clear the grippers and gripper bars as they pass under it, and to lower onto the tail of the sheet in the proper position and engage said sheet between the retarding roller and the wheels so as to draw it in tension before it is completely over the delivery pile. After the sheet has been in tension, it is generally desirable to cause the grippers to release the sheet a-ndto allow the retarding roller and wheel to complete the last of the movement in deliverin the sheet: although in cases where the s eet is very lightweight, the grippers will be caused to retain the sheet a longer time than with a heavier Weight sheet.

In order to control the point of travel at which the grippers will release the sheet, the cam 24 is made adjustable.; said cam being adjustable and mounted on a cam plate 48, said cam plate being fastened on the end of the studs 24. v

The cam 47 which controls the point at which the sheet is nipped by the roller 37 is also made adjustable and is fastened to the cylinder end by a bolt 49 at its center and another bolt 50 which passes through the slot 51 formed in the cam. It will -be seen that the peripheral speed of roller 30 vis slower than the speed of the sheet which is moving over it, and that when the Wheel 37 comes 1n contact with the sheet, the speed of the roller l30 tends to be accelerated by the sheet after it has been drawn taut. The pawl 35 and ratchet 36 allow this acceleration to be accomplished. After the sheet has been drawn taut the grippers are, opened and the final movement in depositing the sheet is given by the rollers. I havev also found that in certain cases the mechanism is more efficient where thebelt 32 is removed from the pulleys and the sheet is nipped between the undriven rollers. In this case,

tension is imparted to the sheet and it is no greater than, and generally not so great a surface speed, as the sheet at the time the grippers release the sheet, and as soon as the release takes place, the friction of the bearings is sufficient to set up a retardation of the'rollers and of the sheet, while at the same time enough energy is stored in the rollers to deliver the tail of the sheet.

What I claim is:

1. In a sheet delivery mechanism, a carrier, sheet taking means on said carrier adapted and arranged to engage the front edge o'f the sheet and carry it over the delivery pile and retarding means adapted and arranged to engage and retard the tail of the sheet while the frontedgeis engaged by said sheet taking means, said sheet taking means and said retarding means being arranged to co-act to stretch the sheet longitudinally before said sheet takin'gmeans is disengaged from the sheet. :f

2. In a sheet delivery mechanism, a carrier, sheet taking means on said carrier adapted and arranged to engage the front edge of the sheet and `carry it over the delivery pile and retarding means located behind the delivery pile and adapted and arranged to engage and retard the tail end of the sheet while the front edgeis engaged by said sheet taking means, said vsheet taking means and said retarding means being arranged 'to co-aet to stretch the sheet longitudinally before said sheet taking means is disengaged from the sheet. l

3. In a sheet delivery mechanism, a carrier, sheet taking means on said carrier adapted and arranged to engage the front edge of the sheet and carry it over the delivery pile, and a pair of rollers located at the rear of the pile and! adapted and 'arranged to engage and reta'rd the tail of the sheet while the front edge is engaged by said sheet taking means. y

41 In a sheet delivery mechanism, a carrier consisting of a pair of endless chains and gripper bars mounted between them; sheet taking means comprising a set of grippers mounted on said bars, a roller located Jcontinuously moving member adapted to below the path of said gripper bars, a coacting movably mounted roller above said roller and means for moving said movably mounted roller into and out of the path of the gripper bars, and into and out of engage- 'ment with the sheet `to retard the tail thereof while it is being carried over the delivery pile by said grippers.

5. In a sheet delivery mechanism, a carrier, a set of grippers mounted on said lcarrier for engaging the front edge of the sheet to carry it over the delivery pile', sheet retarding means adapted to engage the sheet while it is held in said grippers and arranged to stretch the sheet by resisting the pull of said grippers, and means for opening the grippers while the sheet is'in control of the retarding means.

6. In a sheet delivery mechanism, a'carrier, a set of grippers mounted on said carrier arranged to engage the forward end of the sheet to carry it over the delivery pile, a pair of rollers arranged to engage the tail of the sheet, means for moving one roller into and out of contact with the other, means whereby the point of release of the grippers may be varied, and means whereby the point of engagement of the rollers with the-sheet may be varied.

7. In a sheet deliveryI mechanism, a, carrier, means for moving said carrier at a uniform speed, sheet taking means on said carrier and a continuously rotating retarding member constructed and arranged to frictionally engage the sheet while it is held by said sheet taking means.

8. In a sheet delivery mechanism, a carrier, sheet taking means on said carrier, a

frictionally engage the sheet and driving means adapted and arranged to move the engaging surface of said member at a speed slower than the speed of said sheet taking means, said driving means including a slip device adapted and arranged to permit said engaging surface to be moved at a faster speed than that given it by said driving means. 9. In a sheet delivery mechanism, a sheet retarding device comprising a pair of contacting rollers adapted to engage respectively t-he upper and the lower surfaces of the sheet, driving means for said rollers and means' to draw a sheet through said rollers at a speed greater than that of the periphery vof said rollers when driven by said driving means, said driving means including a slip device adapted and arranged to permit said that given them by said driving means.

- witnesses. rollers to' be rotated at a faster speed than l0. In a sheet delivery mechanism, a carrler, sheet taking means on said carrier.

means to release the forward end of the sheet while it` is engaged by the retarding means, said retarding means being adapted and arranged to progress thesheet forwardly, but at a slower speed than that given it by the said carrier.

11. In a sheet delivery mechanism, sheet retarding rollers and a carrier adapted and arranged to engage the sheet and pass it between said rollers and to release it while it is engaged by said rollers, said rollers being adapted and arranged to move the sheet aft-er its release by the'carrier and in the same direction but'at a slower speed than that given by the carrier.

12. In a sheet delivery mechanism, a pair of contacting rollers and a carrier adapted `and arranged to engage the sheet and pass it between said rollers and to release it while it is engaged by said rollers, said rollers being adapted and arranged to rotate after such release to progress the sheet in the same direction as that given by the carrier.

13.' In a sheet delivery mechanism, a ca rrier, a set of grippers mounted on said carrier arranged to engage the forward end of the sheet to carry it overl the delivery pile,

a pair of rollers arranged to engage the tail of the sheet, means for moving one roller into and out of contact with the other and means whereby the point of engagement of the rollers with the sheet may be varied.

14. In a sheet delivery mechanism, 'a carrier, means for moving said carrier at a uniform speed, sheet taking means on said carrier and a rotatable retarding member' constructed and arranged to engage the sheet frictionally while it is held by said sheet taking means.

15. In a sheet delivery mechanism, a carrier, means fo-r vmoving said carrier at a uniformspeed, sheet taking means on said carrier, a movably mounted rotatable retarding member and means to bring said member into frictional engagement with the sheet while it is held by said sheet taking means.

In Witness whereof I have hereunto set my hand in the presence of two subscribing JOSEPH IVHITE. Witnesses:

LEWIS R. ScHoFmLD, JAMES MCCLYMONT.